The bite of the blue-ringed octopus may be painless, but it is definitely deadly.
Their venom contains some maculotoxin that is more violent than the animals found on earth. The poisen is 10,000 times more potent than cyanide.The blue rings are only visible when the blue-ringed octopus is about attack.They found in shallow coral and rock pools in Australia.
The blue-ringed octopus has eight arms and blue rings. If lose an arm to grow a new one.